Pressure-regulator-reducing valve



April 16, 192,9.` 1 w. BRowNE PRESSURE `REGULATOR REDUCING VALVE Filed Aprl 20, 1927 i l mi.

Patented Apr. 16, 19.29.

i UNITED STATES LYLE w. BRoWNE, or MARSHALLTOWN, IOWA, AssrGNoR' rro THEFISH'ER COMPANY, INC., or MARSHALLTOWN, IOWA.

, 1,709,388. inA-'r-Ern oFF-ICE.

GOVERNOR i PRESSURE REGULATOR-REDUCING VALVE.

Application filed April 20,

The object of my invention is to provide a Vpressure regulator reducing` valve' of simple and durable and inexpensive construction. j More particularly, it is my object toy provide such a reducing valve of the type which is equipped with a dash potcontrol for preventing vibration or chattering lof the valve, which structure involves the mount# ing of the dash pot on the valve casing in such manner as to subject it to the heating action of the steam passing 'through the` valve casing -for thus preventing the oil inthe dash pot from congealing. With these and other Objects in view, my invention consists in the construction,l arrangement 'and combination of the various parts of my pressure regulator reducing valve, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, inwhich:

Figure 1' shows a side elevation of a pressure regulator reducing valve for steam lines embodying my linventi on. Figure 2 is a vertical, centralsectional view through the valve structure taken on the line 2-2 of Figure 1.

j Figure 3 is a horizontal, sectional view k.3o of the dash pot and connected parts taken on the line 3 3 of Figure 2; and

Figure 4 is a central'view taken on the line 4 4 of Figure 2. j

It is frequently desirable tok provide in a steam line la reducing valve, whereby pressure on the service side of the valve may be maintained at a predetermined amount.

For this purpose, I have provided a valve casing indicated generally in the accompanying drawings by the reference numeral 10.

The valve casing has the inletl passage 12 connected with an inlet or supply, pipe 14 and the outlet passage 16 connected with a service pipe 18." l 5 v j Projected into the hollow casing from the inlet passage 12 is a cage 20 having upper and lower valve openings 22 and 24.

Screwed into the top of thevalve casing is a hollow cylinder' 26 in which is mounted the hollow stem piston 28 provided -with `annular sealing grooves 'j in its outer surface. Y

The piston 28 is arranged to slide vertically inthe cylinder 26.

Mounted Ato Vslide in the valve openingsl 22 19a?. serial No. 185,244.

and 24 of the valve cage 20 is a cylindershaped valve 32, which has the upper slots 34 and the lower slots 36, vertically elon gated and sol arranged that when the valve is at the lower positionof its movement,

the slots allow free passage of steam from are abovethe lower ends of the openings 22 Y and 24, whereupon these valve passages are closed.`

Pivoted to the upper end of the Vvalvel 32 I.is a valve link 38, which extendsupwardly into the cylinder 26 and is pivoted by a pin 4()l to the stem block 42, which `consists or a .cylindrical portion 42 and a portion 421) .also cylindrical of smaller dia-meter than the portion 42, projectingr upwardly -from the portion42l. The portion 42a of the stem block 42 lits smoothly in the cylinder 26.

Just above the steln block portion 42, the

cylinder 26 is provided with anV internal,

annular rib projects. A

Pivoted in the upper end of the portion 421, is an upwardly projecting piston rod 46.

44 through which the portion 42` Mounted yon the upper part ofthe valve v casing 10 is a' split ring clamp 48, having the vupwardly eXtendinga-rm 49 forming a bracket for the lever 50; The lever 50 is pivoted tothe arm 49 as at 52 and has .intermediate of its length the ring 54 loosely receiving thevcylinder 26. A weight 56 has stem 58 hooked selectively into one of several spaced holes 60 in the lever 50. Additional weights 62 may be mounted on the weight 56.

Pivoted to the opposite sides of the ring 54 as iat 64 are the arms 66 of' a yoke y67, which has in its central cross member at its upper end a hole. 68into which the pistonL rod 46 projects, as shown in Figure 2.

A Cotter pin or the like 70 is projected through thejyoke member 67 in the upper en d of the piston rod 46, as shown in Figures -l and 2.

Formed around the upper endl of the cylinder 26 is an upwardly, opening, annular chamber 72 forming p-art of a dash pot. y Y.

j A cover plate 74 has a downwardly, proshown ink Figure Q. rlhis plate 74 forms a i cylinder and dash pot cover.

The plate 74 has an upwardly extendingl cylindrical portion with a closed upper end 82 forming a compartment 84.

The piston rod 46 is slidably extended through the plate 74 and top or cover member 82.

A vent pipe 86 leads from the compart! ment 84.`

The chamber 72 contains oil or the like 88. Received in the chamber 72 is anannular dash pot piston 90. The arms '92 of a yoke having the central cross member '94 are connected with the dash pot piston and slidably extend upwardlythi'ough the plate 7 4 as shown in Figure 2.

The cross member 94 of the vdash pot piston yoke has the piston rod 46 extended through it and secured to it by means of a pin or the vlike 96.

I will now describe the practical operation of my improved reducing valve.

Assume that the pipe 14 is *connected with a container for steam atY a relatively high pressure and that it is desired to maintain steam at a relatively lower pressure in the pipeAV 18.

It will be seen that when there is no pressure in 'the pipe 18, the valve 32 will be held in its lower position by gravity and steam will pass through the inlet passage l2 and slots 34 and 36 and the valve passages 22 and 24 to the outlet passagelG and the pipe 18.

i As the pressure in the pipe I8 rises, it will act on the stem block 42 o'rraising the stem block, the piston 28, the yoke members 67 and 66 and the lever 50 and the weight 56.

Whenever the pressure on the outlet side of the valve becomes great enough to raise the weight 56, the valveBQ will be raised until the valve passages are closed. i

The pressure to be maintained on the service side of the valve may be regulated by placing as many weights 62 on the weight 56 as is desired to accomplish the purpose. One of the problems involved in the production of a satisfactory reducing valve for steam lines arisesV from the tact that when the valve movements occur, they are likely to be such `as to cause chattering yo'r vibration of the valve, and thereby result in undue wear on the valve parts.

To eliminate the chattering, I have provided the dash pot structure, whereby the movement of the valve toward opening or closing position is steadied.

In providing a dashpot structure for this purpose, difficulties frequently occur owing to thel'act that 'the oil 88 in the dash pot y with the piston rod.

does not remain at the 'same consistency or at nearly enough the same consistency. For instance in cold weather, it is difficult to keep the oil in a sulliciently fluid state.

In order to insure the maintaining of proper fluidity of the oil, I have formed the dash pot chamber at the upper end of the piston cylinder, where it will always be kept warm by reason of the heat of the steam passing through the valve or to which the valve structure is 'subjected The dash pot chamber, being thus warmed, the oil will never congealor get stiff.

It will be noted that I have shown in th'e drawings herewith yfourof the yoke `arms 92 connected by two 'cross members 94. This structure i's provided simply to insure 'a more even action 'o'f the dash 'pot piston 90.

It will be seen that by using a'dil'erent number of weights 62 and by mounting the stem 'or rod 58 'at dilfere'nt points on the l'ever 50, Iam enabie'dto control the `)ressure on the service side of the steam ine for maintaining it wherever desired. M y

The parts are of comparatively simple construction for a valve of this ty'pe,'an`d`the mannerotarranging the dash pot on'th'e pis ton 'cylinder and V'connecting the dash 'pot piston with the piston rod 46 ail'ord's a simple, efficient and economical structure,

whereby the dash por 'oil may vbe 'maintained at the proper temperature to 'preventthe con gealing of the oil, and the dash pot piston may be properly and eilectively connected with the piston rod.

I claimV as my invention: f y

1. Ina 'structure of the'classdes'cribed, a valve casing having inlet and outlet coenings, a valve for controlling fluid flow rom one 'to theother of said openings, a cylinder mounted ontlle valve 'casing and communicating with the valve casing on 'one side of said valve, a piston msaidcylindefr, a stem connecting the valve and the piston, aV dash Vpot chamber formed at the'upper end of said cylinder, a cover cap forfth'edash pot vchamber and the cylinder, a piston rod connected with said 'piston and projecting through said eove`r,"a yoke having its central portion connected with said rod beyond-tl1ecov`e`r, a supporting means, a lever pivot'ed "to said sup! porting means, said yoke having' its arms pivoted 'to said lever, a` dash pot .piston in said dash pot-chamber, a yoke lia'ving its arms connected 'with said dash pot 'piston 'and projecting through said cover and connected 2. In a Vstructure ofthe class described, a valve casing having inlet and outlet openings, a valve for controlling fluid `flow from one to the other of said openings, a cylinder mounted on t-he valve casing and communicating 'with the valve ,casing on one side of said valve, a piston in said cylinder, a stem connecting the valve andthe piston, `a dash pot chamber formed at the upper end of said 3. In a structure of the class described, a cylinder, a cover cap for the dash pot cham- Valve structure including a casing, a cylin ber and the cylinder, a piston rod connected der connected vWith said casing, a pistonA in with said piston and projecting through saidy said cylinder, a valve for controlling iiovv 5 cover, a yoke having its central 'portion conthrough the valve casing connected with said 2U nected With said rod beyond the cover, a suppiston, means for imposing pressure onthe porting means, a lever pivot-ed to said supn piston for holding the valve at one limit of porting means,`said yoke having its arms piv- Lits movement, said means including a piston oted to said lever, a dash pot piston in said rod, a dash pot chamber formed on and sur- 10 dash pot chamber, a yoke having its arms rounding'said cylinder, a Washer like dash 25` connected with said dash pot piston and propot piston therein and surrounding said cyljectine through said cover and connected inder, and means for operatively connecting with t e piston rod, and a chamber arranged the dash pot piston with said piston rod. above sald cover, and a vent pipe leading Des Moines, Iowa, March 30,1927.

15 from said last-named chamber. LYLE W. BROWNE. 

